What are the three worst qualities of the protagonist in white fang?

I'm really not sure that we can attribute "bad" qualities in a human sense to a dog. White Fang is the protagonist of the novel. He is the epitome of the "survival of the fittest" as he is the only one of his litter to survive a famine. London is careful not to attribute too many "human" traits to White Fang that would make him less believable as an animal.